Influence Of Ni-P Electroless Platting On 6063 Aluminum Alloy And Research On Modification Of YG8 Hard Alloy After High Current Pulsed Electron Beam Irradiation

High current pulsed electron beam is developing as a useful tool for surface modification of materials in recent years. When concentrated electron flux transferring its energy into a very thin surface layer within a short time, superfast processes such as heating, melting, evaporation and consequent solidification, as well as dynamic stress induced may impart the surface layer with improved physico-chemical and mechanical properties. This paper presents our research work on influence of electroless Ni-P plating on 6063 aluminum alloys and surface modification of YG8 hard alloy with high current pulsed electron beam equipment of type Nadezhda-2. Microstructure formed in the surface layers of treated samples are characterized by metallographic microscope, SEM, X-ray diffractometry, EPMA. Meantime, we also measure the Microhardness, wear resistance and roughness before and after high current pulsed electron beam treatment.Influence of electroless Ni-P plating on 6063 aluminum alloys with high current pulsed electron beam: The HCPEB irradiation could replace the pre-treatment of aluminum substrate as required in ordinary chemical plating with a decreased surface roughness of Ni-P ally plating layer. The plates exhibit an amorphous microstructure as demonstrated by XRD analysis. While the plates produced with the routine of HCPEB irradiation, activation and chemical plating give good quality and wear resistance, when using HCPEB irradiation of 10 pulses, even better than that of traditional chemical plating technique. And meanwhile, it has good binding force with substrate.Research on modification of YG8 hard alloy with high current pulsed electron beam: The HCPEB irradiation led to the melting and smoothing of irradiated surface. The WC hard particles changed to be regular and round, and dissolved partially into the Co bonding base. Peaks belonging to the Co3W3C phase were detected for the sample treated with 23.4 KV for 3 pulses. With the increase of the number of pulses up to 50, the peaks of Co3W9C4 phase was concomitantly recorded with those of the Co3W3C phase. The microhardness from the original HK 2180.8 increased to HK 3523.6 and the wear resistance was improved about 19%, the roughness of YG8 hard alloy after HCPEB treatment is a little height relative to initial state, but still smoothness and flat.